Release 4.15 net/bluetooth/hci_conn.c

/*
   BlueZ - Bluetooth protocol stack for Linux
   Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.

   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
   SOFTWARE IS DISCLAIMED.
*/

/* Bluetooth HCI connection handling. */

#include <linux/export.h>
#include <linux/debugfs.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <net/bluetooth/l2cap.h>

#include "hci_request.h"
#include "smp.h"
#include "a2mp.h"


struct sco_param {
	
u16 pkt_type;
	
u16 max_latency;
	
u8  retrans_effort;
};


static const struct sco_param esco_param_cvsd[] = {
	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a,	0x01 }, /* S3 */
	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007,	0x01 }, /* S2 */
	{ EDR_ESCO_MASK | ESCO_EV3,   0x0007,	0x01 }, /* S1 */
	{ EDR_ESCO_MASK | ESCO_HV3,   0xffff,	0x01 }, /* D1 */
	{ EDR_ESCO_MASK | ESCO_HV1,   0xffff,	0x01 }, /* D0 */
};


static const struct sco_param sco_param_cvsd[] = {
	{ EDR_ESCO_MASK | ESCO_HV3,   0xffff,	0xff }, /* D1 */
	{ EDR_ESCO_MASK | ESCO_HV1,   0xffff,	0xff }, /* D0 */
};


static const struct sco_param esco_param_msbc[] = {
	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d,	0x02 }, /* T2 */
	{ EDR_ESCO_MASK | ESCO_EV3,   0x0008,	0x02 }, /* T1 */
};

/* This function requires the caller holds hdev->lock */


static void hci_connect_le_scan_cleanup(struct hci_conn *conn)
{
	struct hci_conn_params *params;
	struct hci_dev *hdev = conn->hdev;
	struct smp_irk *irk;
	bdaddr_t *bdaddr;
	u8 bdaddr_type;

	bdaddr = &conn->dst;
	bdaddr_type = conn->dst_type;

	/* Check if we need to convert to identity address */
	irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
	if (irk) {
		bdaddr = &irk->bdaddr;
		bdaddr_type = irk->addr_type;
	}

	params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr,
					   bdaddr_type);
	if (!params || !params->explicit_connect)
		return;

	/* The connection attempt was doing scan for new RPA, and is
         * in scan phase. If params are not associated with any other
         * autoconnect action, remove them completely. If they are, just unmark
         * them as waiting for connection, by clearing explicit_connect field.
         */
	params->explicit_connect = false;

	list_del_init(&params->action);

	switch (params->auto_connect) {
	case HCI_AUTO_CONN_EXPLICIT:
		hci_conn_params_del(hdev, bdaddr, bdaddr_type);
		/* return instead of break to avoid duplicate scan update */
		return;
	case HCI_AUTO_CONN_DIRECT:
	case HCI_AUTO_CONN_ALWAYS:
		list_add(&params->action, &hdev->pend_le_conns);
		break;
	case HCI_AUTO_CONN_REPORT:
		list_add(&params->action, &hdev->pend_le_reports);
		break;
	default:
		break;
	}

	hci_update_background_scan(hdev);
}

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static void hci_conn_cleanup(struct hci_conn *conn)
{
	struct hci_dev *hdev = conn->hdev;

	if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags))
		hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type);

	hci_chan_list_flush(conn);

	hci_conn_hash_del(hdev, conn);

	if (hdev->notify)
		hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);

	hci_conn_del_sysfs(conn);

	debugfs_remove_recursive(conn->debugfs);

	hci_dev_put(hdev);

	hci_conn_put(conn);
}

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static void le_scan_cleanup(struct work_struct *work)
{
	struct hci_conn *conn = container_of(work, struct hci_conn,
					     le_scan_cleanup);
	struct hci_dev *hdev = conn->hdev;
	struct hci_conn *c = NULL;

	BT_DBG("%s hcon %p", hdev->name, conn);

	hci_dev_lock(hdev);

	/* Check that the hci_conn is still around */
	rcu_read_lock();
	list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) {
		if (c == conn)
			break;
	}
	rcu_read_unlock();

	if (c == conn) {
		hci_connect_le_scan_cleanup(conn);
		hci_conn_cleanup(conn);
	}

	hci_dev_unlock(hdev);
	hci_dev_put(hdev);
	hci_conn_put(conn);
}

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static void hci_connect_le_scan_remove(struct hci_conn *conn)
{
	BT_DBG("%s hcon %p", conn->hdev->name, conn);

	/* We can't call hci_conn_del/hci_conn_cleanup here since that
         * could deadlock with another hci_conn_del() call that's holding
         * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work).
         * Instead, grab temporary extra references to the hci_dev and
         * hci_conn and perform the necessary cleanup in a separate work
         * callback.
         */

	hci_dev_hold(conn->hdev);
	hci_conn_get(conn);

	/* Even though we hold a reference to the hdev, many other
         * things might get cleaned up meanwhile, including the hdev's
         * own workqueue, so we can't use that for scheduling.
         */
	schedule_work(&conn->le_scan_cleanup);
}

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3
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static void hci_acl_create_connection(struct hci_conn *conn)
{
	struct hci_dev *hdev = conn->hdev;
	struct inquiry_entry *ie;
	struct hci_cp_create_conn cp;

	BT_DBG("hcon %p", conn);

	conn->state = BT_CONNECT;
	conn->out = true;
	conn->role = HCI_ROLE_MASTER;

	conn->attempt++;

	conn->link_policy = hdev->link_policy;

	memset(&cp, 0, sizeof(cp));
	bacpy(&cp.bdaddr, &conn->dst);
	cp.pscan_rep_mode = 0x02;

	ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
	if (ie) {
		if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
			cp.pscan_rep_mode = ie->data.pscan_rep_mode;
			cp.pscan_mode     = ie->data.pscan_mode;
			cp.clock_offset   = ie->data.clock_offset |
					    cpu_to_le16(0x8000);
		}

		memcpy(conn->dev_class, ie->data.dev_class, 3);
		if (ie->data.ssp_mode > 0)
			set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
	}

	cp.pkt_type = cpu_to_le16(conn->pkt_type);
	if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
		cp.role_switch = 0x01;
	else
		cp.role_switch = 0x00;

	hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
}

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20.16%
10
41.67%
Linus Torvalds
41
16.21%
1
4.17%
Johan Hedberg
18
7.11%
3
12.50%
Andrei Emeltchenko
5
1.98%
2
8.33%
Vinicius Costa Gomes
2
0.79%
2
8.33%
Hideaki Yoshifuji / 吉藤英明
1
0.40%
1
4.17%
Joe Perches
1
0.40%
1
4.17%
Maxim Krasnyansky
1
0.40%
1
4.17%
Total
253
100.00%
24
100.00%



int hci_disconnect(struct hci_conn *conn, __u8 reason)
{
	BT_DBG("hcon %p", conn);

	/* When we are master of an established connection and it enters
         * the disconnect timeout, then go ahead and try to read the
         * current clock offset.  Processing of the result is done
         * within the event handling and hci_clock_offset_evt function.
         */
	if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
	    (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
		struct hci_dev *hdev = conn->hdev;
		struct hci_cp_read_clock_offset clkoff_cp;

		clkoff_cp.handle = cpu_to_le16(conn->handle);
		hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
			     &clkoff_cp);
	}

	return hci_abort_conn(conn, reason);
}

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9
9.18%
1
12.50%
Fabian Frederick
4
4.08%
1
12.50%
Andre Guedes
1
1.02%
1
12.50%
Andrei Emeltchenko
1
1.02%
1
12.50%
Total
98
100.00%
8
100.00%



static void hci_add_sco(struct hci_conn *conn, __u16 handle)
{
	struct hci_dev *hdev = conn->hdev;
	struct hci_cp_add_sco cp;

	BT_DBG("hcon %p", conn);

	conn->state = BT_CONNECT;
	conn->out = true;

	conn->attempt++;

	cp.handle   = cpu_to_le16(handle);
	cp.pkt_type = cpu_to_le16(conn->pkt_type);

	hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
}

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Marcel Holtmann
12
13.95%
4
33.33%
Hideaki Yoshifuji / 吉藤英明
2
2.33%
1
8.33%
Andrei Emeltchenko
1
1.16%
1
8.33%
Johan Hedberg
1
1.16%
1
8.33%
Vinicius Costa Gomes
1
1.16%
1
8.33%
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100.00%
12
100.00%



bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
{
	struct hci_dev *hdev = conn->hdev;
	struct hci_cp_setup_sync_conn cp;
	const struct sco_param *param;

	BT_DBG("hcon %p", conn);

	conn->state = BT_CONNECT;
	conn->out = true;

	conn->attempt++;

	cp.handle   = cpu_to_le16(handle);

	cp.tx_bandwidth   = cpu_to_le32(0x00001f40);
	cp.rx_bandwidth   = cpu_to_le32(0x00001f40);
	cp.voice_setting  = cpu_to_le16(conn->setting);

	switch (conn->setting & SCO_AIRMODE_MASK) {
	case SCO_AIRMODE_TRANSP:
		if (conn->attempt > ARRAY_SIZE(esco_param_msbc))
			return false;
		param = &esco_param_msbc[conn->attempt - 1];
		break;
	case SCO_AIRMODE_CVSD:
		if (lmp_esco_capable(conn->link)) {
			if (conn->attempt > ARRAY_SIZE(esco_param_cvsd))
				return false;
			param = &esco_param_cvsd[conn->attempt - 1];
		} else {
			if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
				return false;
			param = &sco_param_cvsd[conn->attempt - 1];
		}
		break;
	default:
		return false;
	}

	cp.retrans_effort = param->retrans_effort;
	cp.pkt_type = __cpu_to_le16(param->pkt_type);
	cp.max_latency = __cpu_to_le16(param->max_latency);

	if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
		return false;

	return true;
}

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Bernhard Thaler
41
15.59%
1
10.00%
Johan Hedberg
11
4.18%
3
30.00%
Joe Perches
2
0.76%
1
10.00%
Andrei Emeltchenko
1
0.38%
1
10.00%
Total
263
100.00%
10
100.00%



u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
		      u16 to_multiplier)
{
	struct hci_dev *hdev = conn->hdev;
	struct hci_conn_params *params;
	struct hci_cp_le_conn_update cp;

	hci_dev_lock(hdev);

	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
	if (params) {
		params->conn_min_interval = min;
		params->conn_max_interval = max;
		params->conn_latency = latency;
		params->supervision_timeout = to_multiplier;
	}

	hci_dev_unlock(hdev);

	memset(&cp, 0, sizeof(cp));
	cp.handle		= cpu_to_le16(conn->handle);
	cp.conn_interval_min	= cpu_to_le16(min);
	cp.conn_interval_max	= cpu_to_le16(max);
	cp.conn_latency		= cpu_to_le16(latency);
	cp.supervision_timeout	= cpu_to_le16(to_multiplier);
	cp.min_ce_len		= cpu_to_le16(0x0000);
	cp.max_ce_len		= cpu_to_le16(0x0000);

	hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);

	if (params)
		return 0x01;

	return 0x00;
}

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2
1.01%
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100.00%



void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
		      __u8 ltk[16], __u8 key_size)
{
	struct hci_dev *hdev = conn->hdev;
	struct hci_cp_le_start_enc cp;

	BT_DBG("hcon %p", conn);

	memset(&cp, 0, sizeof(cp));

	cp.handle = cpu_to_le16(conn->handle);
	cp.rand = rand;
	cp.ediv = ediv;
	memcpy(cp.ltk, ltk, key_size);

	hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
}

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3.74%
1
25.00%
Andrei Emeltchenko
1
0.93%
1
25.00%
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107
100.00%
4
100.00%

/* Device _must_ be locked */


void hci_sco_setup(struct hci_conn *conn, __u8 status)
{
	struct hci_conn *sco = conn->link;

	if (!sco)
		return;

	BT_DBG("hcon %p", conn);

	if (!status) {
		if (lmp_esco_capable(conn->hdev))
			hci_setup_sync(sco, conn->handle);
		else
			hci_add_sco(sco, conn->handle);
	} else {
		hci_connect_cfm(sco, status);
		hci_conn_del(sco);
	}
}

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1.18%
1
33.33%
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100.00%
3
100.00%



static void hci_conn_timeout(struct work_struct *work)
{
	struct hci_conn *conn = container_of(work, struct hci_conn,
					     disc_work.work);
	int refcnt = atomic_read(&conn->refcnt);

	BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));

	WARN_ON(refcnt < 0);

	/* FIXME: It was observed that in pairing failed scenario, refcnt
         * drops below 0. Probably this is because l2cap_conn_del calls
         * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
         * dropped. After that loop hci_chan_del is called which also drops
         * conn. For now make sure that ACL is alive if refcnt is higher then 0,
         * otherwise drop it.
         */
	if (refcnt > 0)
		return;

	/* LE connections in scanning state need special handling */
	if (conn->state == BT_CONNECT && conn->type == LE_LINK &&
	    test_bit(HCI_CONN_SCANNING, &conn->flags)) {
		hci_connect_le_scan_remove(conn);
		return;
	}

	hci_abort_conn(conn, hci_proto_disconn_ind(conn));
}

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15
13.51%
1
7.69%
Gustavo Fernando Padovan
15
13.51%
1
7.69%
Linus Torvalds
12
10.81%
1
7.69%
Marcel Holtmann
10
9.01%
3
23.08%
Johan Hedberg
9
8.11%
1
7.69%
Ville Tervo
7
6.31%
1
7.69%
Andrei Emeltchenko
4
3.60%
2
15.38%
Claudio Takahasi
2
1.80%
1
7.69%
Total
111
100.00%
13
100.00%

/* Enter sniff mode */


static void hci_conn_idle(struct work_struct *work)
{
	struct hci_conn *conn = container_of(work, struct hci_conn,
					     idle_work.work);
	struct hci_dev *hdev = conn->hdev;

	BT_DBG("hcon %p mode %d", conn, conn->mode);

	if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
		return;

	if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
		return;

	if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
		struct hci_cp_sniff_subrate cp;
		cp.handle             = cpu_to_le16(conn->handle);
		cp.max_latency        = cpu_to_le16(0);
		cp.min_remote_timeout = cpu_to_le16(0);
		cp.min_local_timeout  = cpu_to_le16(0);
		hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
	}

	if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
		struct hci_cp_sniff_mode cp;
		cp.handle       = cpu_to_le16(conn->handle);
		cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
		cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
		cp.attempt      = cpu_to_le16(4);
		cp.timeout      = cpu_to_le16(1);
		hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
	}
}

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5
2.11%
1
20.00%
Andrei Emeltchenko
1
0.42%
1
20.00%
Total
237
100.00%
5
100.00%



static void hci_conn_auto_accept(struct work_struct *work)
{
	struct hci_conn *conn = container_of(work, struct hci_conn,
					     auto_accept_work.work);

	hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
		     &conn->dst);
}

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static void le_conn_timeout(struct work_struct *work)
{
	struct hci_conn *conn = container_of(work, struct hci_conn,
					     le_conn_timeout.work);
	struct hci_dev *hdev = conn->hdev;

	BT_DBG("");

	/* We could end up here due to having done directed advertising,
         * so clean up the state if necessary. This should however only
         * happen with broken hardware or if low duty cycle was used
         * (which doesn't have a timeout of its own).
         */
	if (conn->role == HCI_ROLE_SLAVE) {
		u8 enable = 0x00;
		hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
			     &enable);
		hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
		return;
	}

	hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
}

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struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
			      u8 role)
{
	struct hci_conn *conn;

	BT_DBG("%s dst %pMR", hdev->name, dst);

	conn = kzalloc(sizeof(*conn), GFP_KERNEL);
	if (!conn)
		return NULL;

	bacpy(&conn->dst, dst);
	bacpy(&conn->src, &hdev->bdaddr);
	conn->hdev  = hdev;
	conn->type  = type;
	conn->role  = role;
	conn->mode  = HCI_CM_ACTIVE;
	conn->state = BT_OPEN;
	conn->auth_type = HCI_AT_GENERAL_BONDING;
	conn->io_capability = hdev->io_capability;
	conn->remote_auth = 0xff;
	conn->key_type = 0xff;
	conn->rssi = HCI_RSSI_INVALID;
	conn->tx_power = HCI_TX_POWER_INVALID;
	conn->max_tx_power = HCI_TX_POWER_INVALID;

	set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
	conn->disc_timeout = HCI_DISCONN_TIMEOUT;

	if (conn->role == HCI_ROLE_MASTER)
		conn->out = true;

	switch (type) {
	case ACL_LINK:
		conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
		break;
	case LE_LINK:
		/* conn->src should reflect the local identity address */
		hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
		break;
	case SCO_LINK:
		if (lmp_esco_capable(hdev))
			conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
					(hdev->esco_type & EDR_ESCO_MASK);
		else
			conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
		break;
	case ESCO_LINK:
		conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
		break;
	}

	skb_queue_head_init(&conn->data_q);

	INIT_LIST_HEAD(&conn->chan_list);

	INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
	INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
	INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
	INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
	INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup);

	atomic_set(&conn->refcnt, 0);

	hci_dev_hold(hdev);

	hci_conn_hash_add(hdev, conn);
	if (hdev->notify)
		hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);

	hci_conn_init_sysfs(conn);

	return conn;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
142
36.04%
7
21.88%
Johan Hedberg
105
26.65%
12
37.50%
Maksim Krasnyanskiy
71
18.02%
2
6.25%
Linus Torvalds
36
9.14%
1
3.12%
Andrzej Kaczmarek
12
3.05%
2
6.25%
Andrei Emeltchenko
7
1.78%
2
6.25%
Gustavo Fernando Padovan
6
1.52%
2
6.25%
Waldemar Rymarkiewicz
6
1.52%
1
3.12%
Luiz Augusto von Dentz
4
1.02%
1
3.12%
Pavel Emelyanov
4
1.02%
1
3.12%
Andre Guedes
1
0.25%
1
3.12%
Total
394
100.00%
32
100.00%



int hci_conn_del(struct hci_conn *conn)
{
	struct hci_dev *hdev = conn->hdev;

	BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);

	cancel_delayed_work_sync(&conn->disc_work);
	cancel_delayed_work_sync(&conn->auto_accept_work);
	cancel_delayed_work_sync(&conn->idle_work);

	if (conn->type == ACL_LINK) {
		struct hci_conn *sco = conn->link;
		if (sco)
			sco->link = NULL;

		/* Unacked frames */
		hdev->acl_cnt += conn->sent;
	} else if (conn->type == LE_LINK) {
		cancel_delayed_work(&conn->le_conn_timeout);

		if (hdev->le_pkts)
			hdev->le_cnt += conn->sent;
		else
			hdev->acl_cnt += conn->sent;
	} else {
		struct hci_conn *acl = conn->link;
		if (acl) {
			acl->link = NULL;
			hci_conn_drop(acl);
		}
	}

	if (conn->amp_mgr)
		amp_mgr_put(conn->amp_mgr);

	skb_queue_purge(&conn->data_q);

	/* Remove the connection from the list and cleanup its remaining
         * state. This is a separate function since for some cases like
         * BT_CONNECT_SCAN we *only* want the cleanup part without the
         * rest of hci_conn_del.
         */
	hci_conn_cleanup(conn);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
57
28.93%
1
6.25%
Linus Torvalds
37
18.78%
1
6.25%
Ville Tervo
34
17.26%
1
6.25%
Marcel Holtmann
28
14.21%
2
12.50%
Johan Hedberg
21
10.66%
6
37.50%
Andrei Emeltchenko
14
7.11%
2
12.50%
Tomas Targownik
4
2.03%
1
6.25%
David Herrmann
1
0.51%
1
6.25%
Gustavo Fernando Padovan
1
0.51%
1
6.25%
Total
197
100.00%
16
100.00%



struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type)
{
	int use_src = bacmp(src, BDADDR_ANY);
	struct hci_dev *hdev = NULL, *d;

	BT_DBG("%pMR -> %pMR", src, dst);

	read_lock(&hci_dev_list_lock);

	list_for_each_entry(d, &hci_dev_list, list) {
		if (!test_bit(HCI_UP, &d->flags) ||
		    hci_dev_test_flag(d, HCI_USER_CHANNEL) ||
		    d->dev_type != HCI_PRIMARY)
			continue;

		/* Simple routing:
                 *   No source address - find interface with bdaddr != dst
                 *   Source address    - find interface with bdaddr == src
                 */

		if (use_src) {
			bdaddr_t id_addr;
			u8 id_addr_type;

			if (src_type == BDADDR_BREDR) {
				if (!lmp_bredr_capable(d))
					continue;
				bacpy(&id_addr, &d->bdaddr);
				id_addr_type = BDADDR_BREDR;
			} else {
				if (!lmp_le_capable(d))
					continue;

				hci_copy_identity_address(d, &id_addr,
							  &id_addr_type);

				/* Convert from HCI to three-value type */
				if (id_addr_type == ADDR_LE_DEV_PUBLIC)
					id_addr_type = BDADDR_LE_PUBLIC;
				else
					id_addr_type = BDADDR_LE_RANDOM;
			}

			if (!bacmp(&id_addr, src) && id_addr_type == src_type) {
				hdev = d; break;
			}
		} else {
			if (bacmp(&d->bdaddr, dst)) {
				hdev = d; break;
			}
		}
	}

	if (hdev)
		hdev = hci_dev_hold(hdev);

	read_unlock(&hci_dev_list_lock);
	return hdev;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
89
37.39%
3
21.43%
Johan Hedberg
83
34.87%
1
7.14%
Linus Torvalds
43
18.07%
1
7.14%
Marcel Holtmann
9
3.78%
4
28.57%
Luiz Augusto von Dentz
6
2.52%
1
7.14%
Andrei Emeltchenko
5
2.10%
2
14.29%
Gustavo Fernando Padovan
2
0.84%
1
7.14%
Hideaki Yoshifuji / 吉藤英明
1
0.42%
1
7.14%
Total
238
100.00%
14
100.00%


EXPORT_SYMBOL(hci_get_route);

/* This function requires the caller holds hdev->lock */


void hci_le_conn_failed(struct hci_conn *conn, u8 status)
{
	struct hci_dev *hdev = conn->hdev;
	struct hci_conn_params *params;

	params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
					   conn->dst_type);
	if (params && params->conn) {
		hci_conn_drop(params->conn);
		hci_conn_put(params->conn);
		params->conn = NULL;
	}

	conn->state = BT_CLOSED;

	/* If the status indicates successful cancellation of
         * the attempt (i.e. Unkown Connection Id) there's no point of
         * notifying failure since we'll go back to keep trying to
         * connect. The only exception is explicit connect requests
         * where a timeout + cancel does indicate an actual failure.
         */
	if (status != HCI_ERROR_UNKNOWN_CONN_ID ||
	    (params && params->explicit_connect))
		mgmt_connect_failed(hdev, &conn->dst, conn->type,
				    conn->dst_type, status);

	hci_connect_cfm(conn, status);

	hci_conn_del(conn);

	/* Since we may have temporarily stopped the background scanning in
         * favor of connection establishment, we should restart it.
         */
	hci_update_background_scan(hdev);

	/* Re-enable advertising in case this was a failed connection
         * attempt as a peripheral.
         */
	hci_req_reenable_advertising(hdev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
76
53.90%
6
66.67%
Andre Guedes
65
46.10%
3
33.33%
Total
141
100.00%
9
100.00%



static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	struct hci_conn *conn;

	hci_dev_lock(hdev);

	conn = hci_lookup_le_connect(hdev);

	if (!status) {
		hci_connect_le_scan_cleanup(conn);
		goto done;
	}

	bt_dev_err(hdev, "request failed to create LE connection: "
		   "status 0x%2.2x", status);

	if (!conn)
		goto done;

	hci_le_conn_failed(conn, status);

done:
	hci_dev_unlock(hdev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andre Guedes
52
64.20%
2
33.33%
Jakub Pawlowski
21
25.93%
2
33.33%
Marcel Holtmann
8
9.88%
2
33.33%
Total
81
100.00%
6
100.00%



static bool conn_use_rpa(struct hci_conn *conn)
{
	struct hci_dev *hdev = conn->hdev;

	return hci_dev_test_flag(hdev, HCI_PRIVACY);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
28
100.00%
1
100.00%
Total
28
100.00%
1
100.00%



static void hci_req_add_le_create_conn(struct hci_request *req,
				       struct hci_conn *conn)
{
	struct hci_cp_le_create_conn cp;
	struct hci_dev *hdev = conn->hdev;
	u8 own_addr_type;

	/* Update random address, but set require_privacy to false so
         * that we never connect with an non-resolvable address.
         */
	if (hci_update_random_address(req, false, conn_use_rpa(conn),
				      &own_addr_type))
		return;

	memset(&cp, 0, sizeof(cp));

	/* Set window to be the same value as the interval to enable
         * continuous scanning.
         */
	cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
	cp.scan_window = cp.scan_interval;

	bacpy(&cp.peer_addr, &conn->dst);
	cp.peer_addr_type = conn->dst_type;
	cp.own_address_type = own_addr_type;
	cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
	cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
	cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
	cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
	cp.min_ce_len = cpu_to_le16(0x0000);
	cp.max_ce_len = cpu_to_le16(0x0000);

	hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);

	conn->state = BT_CONNECT;
	clear_bit(HCI_CONN_SCANNING, &conn->flags);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andre Guedes
148
72.55%
1
11.11%
Johan Hedberg
28
13.73%
4
44.44%
Marcel Holtmann
15
7.35%
2
22.22%
Jakub Pawlowski
10
4.90%
1
11.11%
Joe Perches
3
1.47%
1
11.11%
Total
204
100.00%
9
100.00%



static void hci_req_directed_advertising(struct hci_request *req,
					 struct hci_conn *conn)
{
	struct hci_dev *hdev = req->hdev;
	struct hci_cp_le_set_adv_param cp;
	u8 own_addr_type;
	u8 enable;

	/* Clear the HCI_LE_ADV bit temporarily so that the
         * hci_update_random_address knows that it's safe to go ahead
         * and write a new random address. The flag will be set back on
         * as soon as the SET_ADV_ENABLE HCI command completes.
         */
	hci_dev_clear_flag(hdev, HCI_LE_ADV);

	/* Set require_privacy to false so that the remote device has a
         * chance of identifying us.
         */
	if (hci_update_random_address(req, false, conn_use_rpa(conn),
				      &own_addr_type) < 0)
		return;

	memset(&cp, 0, sizeof(cp));
	cp.type = LE_ADV_DIRECT_IND;
	cp.own_address_type = own_addr_type;
	cp.direct_addr_type = conn->dst_type;
	bacpy(&cp.direct_addr, &conn->dst);
	cp.channel_map = hdev->le_adv_channel_map;

	hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp);

	enable = 0x01;
	hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);

	conn->state = BT_CONNECT;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
155
98.10%
3
75.00%
Marcel Holtmann
3
1.90%
1
25.00%
Total
158
100.00%
4
100.00%



struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
				u8 dst_type, u8 sec_level, u16 conn_timeout,
				u8 role)
{
	struct hci_conn_params *params;
	struct hci_conn *conn;
	struct smp_irk *irk;
	struct hci_request req;
	int err;

	/* Let's make sure that le is enabled.*/
	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
		if (lmp_le_capable(hdev))
			return ERR_PTR(-ECONNREFUSED);

		return ERR_PTR(-EOPNOTSUPP);
	}

	/* Since the controller supports only one LE connection attempt at a
         * time, we return -EBUSY if there is any connection attempt running.
         */
	if (hci_lookup_le_connect(hdev))
		return ERR_PTR(-EBUSY);

	/* If there's already a connection object but it's not in
         * scanning state it means it must already be established, in
         * which case we can't do anything else except report a failure
         * to connect.
         */
	conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
	if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) {
		return ERR_PTR(-EBUSY);
	}

	/* When given an identity address with existing identity
         * resolving key, the connection needs to be established
         * to a resolvable random address.
         *
         * Storing the resolvable random address is required here
         * to handle connection failures. The address will later
         * be resolved back into the original identity address
         * from the connect request.
         */
	irk = hci_find_irk_by_addr(hdev, dst, dst_type);
	if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
		dst = &irk->rpa;
		dst_type = ADDR_LE_DEV_RANDOM;
	}

	if (conn) {
		bacpy(&conn->dst, dst);
	} else {
		conn = hci_conn_add(hdev, LE_LINK, dst, role);
		if (!conn)
			return ERR_PTR(-ENOMEM);
		hci_conn_hold(conn);
		conn->pending_sec_level = sec_level;
	}

	conn->dst_type = dst_type;
	conn->sec_level = BT_SECURITY_LOW;
	conn->conn_timeout = conn_timeout;

	hci_req_init(&req, hdev);

	/* Disable advertising if we're active. For master role
         * connections most controllers will refuse to connect if
         * advertising is enabled, and for slave role connections we
         * anyway have to disable it in order to start directed
         * advertising.
         */
	if (hci_dev_test_flag(hdev, HCI_LE_ADV)) {
		u8 enable = 0x00;
		hci_req_add(&req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
			    &enable);
	}

	/* If requested to connect as slave use directed advertising */
	if (conn->role == HCI_ROLE_SLAVE) {
		/* If we're active scanning most controllers are unable
                 * to initiate advertising. Simply reject the attempt.
                 */
		if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
		    hdev->le_scan_type == LE_SCAN_ACTIVE) {
			hci_req_purge(&req);
			hci_conn_del(conn);
			return ERR_PTR(-EBUSY);
		}

		hci_req_directed_advertising(&req, conn);
		goto create_conn;
	}

	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
	if (params) {
		conn->le_conn_min_interval = params->conn_min_interval;
		conn->le_conn_max_interval = params->conn_max_interval;
		conn->le_conn_latency = params->conn_latency;
		conn->le_supv_timeout = params->supervision_timeout;
	} else {
		conn->le_conn_min_interval = hdev->le_conn_min_interval;
		conn->le_conn_max_interval = hdev->le_conn_max_interval;
		conn->le_conn_latency = hdev->le_conn_latency;
		conn->le_supv_timeout = hdev->le_supv_timeout;
	}

	/* If controller is scanning, we stop it since some controllers are
         * not able to scan and connect at the same time. Also set the
         * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
         * handler for scan disabling knows to set the correct discovery
         * state.
         */
	if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
		hci_req_add_le_scan_disable(&req);
		hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
	}

	hci_req_add_le_create_conn(&req, conn);

create_conn:
	err = hci_req_run(&req, create_le_conn_complete);
	if (err) {
		hci_conn_del(conn);
		return ERR_PTR(err);
	}

	return conn;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
184
36.80%
12
32.43%
Andre Guedes
140
28.00%
9
24.32%
Marcel Holtmann
52
10.40%
7
18.92%
Ville Tervo
36
7.20%
2
5.41%
Jakub Pawlowski
35
7.00%
1
2.70%
Lukasz Rymanowski
31
6.20%
1
2.70%
Maksim Krasnyanskiy
9
1.80%
1
2.70%
Linus Torvalds
8
1.60%
1
2.70%
Vinicius Costa Gomes
3
0.60%
1
2.70%
Jaganath Kanakkassery
1
0.20%
1
2.70%
Andrzej Kaczmarek
1
0.20%
1
2.70%
Total
500
100.00%
37
100.00%



static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
{
	struct hci_conn *conn;

	conn = hci_conn_hash_lookup_le(hdev, addr, type);
	if (!conn)
		return false;

	if (conn->state != BT_CONNECTED)
		return false;

	return true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jakub Pawlowski
53
94.64%
1
50.00%
Johan Hedberg
3
5.36%
1
50.00%
Total
56
100.00%
2
100.00%

/* This function requires the caller holds hdev->lock */


static int hci_explicit_conn_params_set(struct hci_dev *hdev,
					bdaddr_t *addr, u8 addr_type)
{
	struct hci_conn_params *params;

	if (is_connected(hdev, addr, addr_type))
		return -EISCONN;

	params = hci_conn_params_lookup(hdev, addr, addr_type);
	if (!params) {
		params = hci_conn_params_add(hdev, addr, addr_type);
		if (!params)
			return -ENOMEM;

		/* If we created new params, mark them to be deleted in
                 * hci_connect_le_scan_cleanup. It's different case than
                 * existing disabled params, those will stay after cleanup.
                 */
		params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
	}

	/* We're trying to connect, so make sure params are at pend_le_conns */
	if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
	    params->auto_connect == HCI_AUTO_CONN_REPORT ||
	    params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
		list_del_init(&params->action);
		list_add(&params->action, &hdev->pend_le_conns);
	}

	params->explicit_connect = true;

	BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
	       params->auto_connect);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jakub Pawlowski
142
95.30%
2
50.00%
Johan Hedberg
7
4.70%
2
50.00%
Total
149
100.00%
4
100.00%

/* This function requires the caller holds hdev->lock */


struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
				     u8 dst_type, u8 sec_level,
				     u16 conn_timeout)
{
	struct hci_conn *conn;

	/* Let's make sure that le is enabled.*/
	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
		if (lmp_le_capable(hdev))
			return ERR_PTR(-ECONNREFUSED);

		return ERR_PTR(-EOPNOTSUPP);
	}

	/* Some devices send ATT messages as soon as the physical link is
         * established. To be able to handle these ATT messages, the user-
         * space first establishes the connection and then starts the pairing
         * process.
         *
         * So if a hci_conn object already exists for the following connection
         * attempt, we simply update pending_sec_level and auth_type fields
         * and return the object found.
         */
	conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
	if (conn) {
		if (conn->pending_sec_level < sec_level)
			conn->pending_sec_level = sec_level;
		goto done;
	}

	BT_DBG("requesting refresh of dst_addr");

	conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
	if (!conn)
		return ERR_PTR(-ENOMEM);

	if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0)
		return ERR_PTR(-EBUSY);

	conn->state = BT_CONNECT;
	set_bit(HCI_CONN_SCANNING, &conn->flags);
	conn->dst_type = dst_type;
	conn->sec_level = BT_SECURITY_LOW;
	conn->pending_sec_level = sec_level;
	conn->conn_timeout = conn_timeout;

	hci_update_background_scan(hdev);

done:
	hci_conn_hold(conn);
	return conn;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jakub Pawlowski
194
95.10%
1
25.00%
Johan Hedberg
10
4.90%
3
75.00%
Total
204
100.00%
4
100.00%



struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
				 u8 sec_level, u8 auth_type)
{
	struct hci_conn *acl;

	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
		if (lmp_bredr_capable(hdev))
			return ERR_PTR(-ECONNREFUSED);

		return ERR_PTR(-EOPNOTSUPP);
	}

	acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
	if (!acl) {
		acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
		if (!acl)
			return ERR_PTR(-ENOMEM);
	}

	hci_conn_hold(acl);

	if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
		acl->sec_level = BT_SECURITY_LOW;
		acl->pending_sec_level = sec_level;
		acl->auth_type = auth_type;
		hci_acl_create_connection(acl);
	}

	return acl;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
38
25.33%
2
12.50%
Vinicius Costa Gomes
31
20.67%
3
18.75%
Johan Hedberg
27
18.00%
5
31.25%
Marcel Holtmann
17
11.33%
3
18.75%
Lukasz Rymanowski
16
10.67%
1
6.25%
Linus Torvalds
12
8.00%
1
6.25%
Andrei Emeltchenko
9
6.00%
1
6.25%
Total
150
100.00%
16
100.00%



struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
				 __u16 setting)
{
	struct hci_conn *acl;
	struct hci_conn *sco;

	acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING);
	if (IS_ERR(acl))
		return acl;

	sco = hci_conn_hash_lookup_ba(hdev, type, dst);
	if (!sco) {
		sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER);
		if (!sco) {
			hci_conn_drop(acl);
			return ERR_PTR(-ENOMEM);
		}
	}

	acl->link = sco;
	sco->link = acl;

	hci_conn_hold(sco);

	sco->setting = setting;

	if (acl->state == BT_CONNECTED &&
	    (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
		set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
		hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);

		if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
			/* defer SCO setup until mode change completed */
			set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
			return sco;
		}

		hci_sco_setup(acl, 0x00);
	}

	return sco;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
65
31.40%
2
10.53%
Vinicius Costa Gomes
43
20.77%
3
15.79%
Marcel Holtmann
36
17.39%
3
15.79%
Johan Hedberg
16
7.73%
4
21.05%
Linus Torvalds
16
7.73%
1
5.26%
Frédéric Dalleau
11
5.31%
2
10.53%
Andrei Emeltchenko
9
4.35%
1
5.26%
Nick Pelly
8
3.86%
1
5.26%
Jaikumar Ganesh
2
0.97%
1
5.26%
David Herrmann
1
0.48%
1
5.26%
Total
207
100.00%
19
100.00%

/* Check link security requirement */


int hci_conn_check_link_mode(struct hci_conn *conn)
{
	BT_DBG("hcon %p", conn);

	/* In Secure Connections Only mode, it is required that Secure
         * Connections is used and the link is encrypted with AES-CCM
         * using a P-256 authenticated combination key.
         */
	if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
		if (!hci_conn_sc_enabled(conn) ||
		    !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
		    conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
			return 0;
	}

	if (hci_conn_ssp_enabled(conn) &&
	    !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
		return 0;

	return 1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
72
86.75%
3
42.86%
Johan Hedberg
10
12.05%
3
42.86%
Andrei Emeltchenko
1
1.20%
1
14.29%
Total
83
100.00%
7
100.00%

/* Authenticate remote device */


static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
{
	BT_DBG("hcon %p", conn);

	if (conn->pending_sec_level > sec_level)
		sec_level = conn->pending_sec_level;

	if (sec_level > conn->sec_level)
		conn->pending_sec_level = sec_level;
	else if (test_bit(HCI_CONN_AUTH, &conn->flags))
		return 1;

	/* Make sure we preserve an existing MITM requirement*/
	auth_type |= (conn->auth_type & 0x01);

	conn->auth_type = auth_type;

	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
		struct hci_cp_auth_requested cp;

		cp.handle = cpu_to_le16(conn->handle);
		hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
			     sizeof(cp), &cp);

		/* If we're already encrypted set the REAUTH_PEND flag,
                 * otherwise set the ENCRYPT_PEND.
                 */
		if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
			set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
		else
			set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
54
31.95%
5
29.41%
Maksim Krasnyanskiy
44
26.04%
3
17.65%
Marcel Holtmann
28
16.57%
5
29.41%
Linus Torvalds
27
15.98%
1
5.88%
Waldemar Rymarkiewicz
14
8.28%
1
5.88%
Hideaki Yoshifuji / 吉藤英明
1
0.59%
1
5.88%
Andrei Emeltchenko
1
0.59%
1
5.88%
Total
169
100.00%
17
100.00%

/* Encrypt the the link */


static void hci_conn_encrypt(struct hci_conn *conn)
{
	BT_DBG("hcon %p", conn);

	if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
		struct hci_cp_set_conn_encrypt cp;
		cp.handle  = cpu_to_le16(conn->handle);
		cp.encrypt = 0x01;
		hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
			     &cp);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Waldemar Rymarkiewicz
69
97.18%
1
33.33%
Andrei Emeltchenko
1
1.41%
1
33.33%
Johan Hedberg
1
1.41%
1
33.33%
Total
71
100.00%
3
100.00%

/* Enable security */


int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
		      bool initiator)
{
	BT_DBG("hcon %p", conn);

	if (conn->type == LE_LINK)
		return smp_conn_security(conn, sec_level);

	/* For sdp we don't need the link key. */
	if (sec_level == BT_SECURITY_SDP)
		return 1;

	/* For non 2.1 devices and low security level we don't need the link
           key. */
	if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
		return 1;

	/* For other security levels we need the link key. */
	if (!test_bit(HCI_CONN_AUTH, &conn->flags))
		goto auth;

	/* An authenticated FIPS approved combination key has sufficient
         * security for security level 4. */
	if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
	    sec_level == BT_SECURITY_FIPS)
		goto encrypt;

	/* An authenticated combination key has sufficient security for
           security level 3. */
	if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
	     conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
	    sec_level == BT_SECURITY_HIGH)
		goto encrypt;

	/* An unauthenticated combination key has sufficient security for
           security level 1 and 2. */
	if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
	     conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
	    (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
		goto encrypt;

	/* A combination key has always sufficient security for the security
           levels 1 or 2. High security level requires the combination key
           is generated using maximum PIN code length (16).
           For pre 2.1 units. */
	if (conn->key_type == HCI_LK_COMBINATION &&
	    (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
	     conn->pin_length == 16))
		goto encrypt;

auth:
	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
		return 0;

	if (initiator)
		set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);

	if (!hci_conn_auth(conn, sec_level, auth_type))
		return 0;

encrypt:
	if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
		return 1;

	hci_conn_encrypt(conn);
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
79
31.10%
7
35.00%
Waldemar Rymarkiewicz
73
28.74%
1
5.00%
Johan Hedberg
35
13.78%
6
30.00%
Maksim Krasnyanskiy
30
11.81%
1
5.00%
Vinicius Costa Gomes
16
6.30%
1
5.00%
Linus Torvalds
15
5.91%
1
5.00%
Luiz Augusto von Dentz
4
1.57%
1
5.00%
Andrei Emeltchenko
1
0.39%
1
5.00%
Gustavo Fernando Padovan
1
0.39%
1
5.00%
Total
254
100.00%
20
100.00%


EXPORT_SYMBOL(hci_conn_security);

/* Check secure link requirement */


int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
{
	BT_DBG("hcon %p", conn);

	/* Accept if non-secure or higher security level is required */
	if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
		return 1;

	/* Accept if secure or higher security level is already present */
	if (conn->sec_level == BT_SECURITY_HIGH ||
	    conn->sec_level == BT_SECURITY_FIPS)
		return 1;

	/* Reject not secure link */
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Waldemar Rymarkiewicz
42
75.00%
2
50.00%
Marcel Holtmann
13
23.21%
1
25.00%
Andrei Emeltchenko
1
1.79%
1
25.00%
Total
56
100.00%
4
100.00%


EXPORT_SYMBOL(hci_conn_check_secure);

/* Switch role */


int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
{
	BT_DBG("hcon %p", conn);

	if (role == conn->role)
		return 1;

	if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
		struct hci_cp_switch_role cp;
		bacpy(&cp.bdaddr, &conn->dst);
		cp.role = role;
		hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
	}

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
85
95.51%
3
50.00%
Johan Hedberg
3
3.37%
2
33.33%
Andrei Emeltchenko
1
1.12%
1
16.67%
Total
89
100.00%
6
100.00%


EXPORT_SYMBOL(hci_conn_switch_role);

/* Enter active mode */


void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
{
	struct hci_dev *hdev = conn->hdev;

	BT_DBG("hcon %p mode %d", conn, conn->mode);

	if (conn->mode != HCI_CM_SNIFF)
		goto timer;

	if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
		goto timer;

	if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
		struct hci_cp_exit_sniff_mode cp;
		cp.handle = cpu_to_le16(conn->handle);
		hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
	}

timer:
	if (hdev->idle_timeout > 0)
		queue_delayed_work(hdev->workqueue, &conn->idle_work,
				   msecs_to_jiffies(hdev->idle_timeout));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
109
79.56%
2
25.00%
Johan Hedberg
14
10.22%
3
37.50%
Jaikumar Ganesh
12
8.76%
1
12.50%
Andrei Emeltchenko
1
0.73%
1
12.50%
Hideaki Yoshifuji / 吉藤英明
1
0.73%
1
12.50%
Total
137
100.00%
8
100.00%

/* Drop all connection on the device */


void hci_conn_hash_flush(struct hci_dev *hdev)
{
	struct hci_conn_hash *h = &hdev->conn_hash;
	struct hci_conn *c, *n;

	BT_DBG("hdev %s", hdev->name);

	list_for_each_entry_safe(c, n, &h->list, list) {
		c->state = BT_CLOSED;

		hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
		hci_conn_del(c);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
33
49.25%
2
28.57%
Linus Torvalds
20
29.85%
1
14.29%
Andrei Emeltchenko
7
10.45%
2
28.57%
Gustavo Fernando Padovan
6
8.96%
1
14.29%
Johan Hedberg
1
1.49%
1
14.29%
Total
67
100.00%
7
100.00%

/* Check pending connect attempts */


void hci_conn_check_pending(struct hci_dev *hdev)
{
	struct hci_conn *conn;

	BT_DBG("hdev %s", hdev->name);

	hci_dev_lock(hdev);

	conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
	if (conn)
		hci_acl_create_connection(conn);

	hci_dev_unlock(hdev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
53
98.15%
1
50.00%
Vinicius Costa Gomes
1
1.85%
1
50.00%
Total
54
100.00%
2
100.00%



static u32 get_link_mode(struct hci_conn *conn)
{
	u32 link_mode = 0;

	if (conn->role == HCI_ROLE_MASTER)
		link_mode |= HCI_LM_MASTER;

	if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
		link_mode |= HCI_LM_ENCRYPT;

	if (test_bit(HCI_CONN_AUTH, &conn->flags))
		link_mode |= HCI_LM_AUTH;

	if (test_bit(HCI_CONN_SECURE, &conn->flags))
		link_mode |= HCI_LM_SECURE;

	if (test_bit(HCI_CONN_FIPS, &conn->flags))
		link_mode |= HCI_LM_FIPS;

	return link_mode;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
95
100.00%
2
100.00%
Total
95
100.00%
2
100.00%



int hci_get_conn_list(void __user *arg)
{
	struct hci_conn *c;
	struct hci_conn_list_req req, *cl;
	struct hci_conn_info *ci;
	struct hci_dev *hdev;
	int n = 0, size, err;

	if (copy_from_user(&req, arg, sizeof(req)))
		return -EFAULT;

	if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
		return -EINVAL;

	size = sizeof(req) + req.conn_num * sizeof(*ci);

	cl = kmalloc(size, GFP_KERNEL);
	if (!cl)
		return -ENOMEM;

	hdev = hci_dev_get(req.dev_id);
	if (!hdev) {
		kfree(cl);
		return -ENODEV;
	}

	ci = cl->conn_info;

	hci_dev_lock(hdev);
	list_for_each_entry(c, &hdev->conn_hash.list, list) {
		bacpy(&(ci + n)->bdaddr, &c->dst);
		(ci + n)->handle = c->handle;
		(ci + n)->type  = c->type;
		(ci + n)->out   = c->out;
		(ci + n)->state = c->state;
		(ci + n)->link_mode = get_link_mode(c);
		if (++n >= req.conn_num)
			break;
	}
	hci_dev_unlock(hdev);

	cl->dev_id = hdev->id;
	cl->conn_num = n;
	size = sizeof(req) + n * sizeof(*ci);

	hci_dev_put(hdev);

	err = copy_to_user(arg, cl, size);
	kfree(cl);

	return err ? -EFAULT : 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
176
55.17%
1
12.50%
Marcel Holtmann
67
21.00%
1
12.50%
Linus Torvalds
49
15.36%
1
12.50%
Andrei Emeltchenko
10
3.13%
1
12.50%
Luiz Augusto von Dentz
9
2.82%
1
12.50%
Al Viro
3
0.94%
1
12.50%
Johan Hedberg
3
0.94%
1
12.50%
Gustavo Fernando Padovan
2
0.63%
1
12.50%
Total
319
100.00%
8
100.00%



int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
{
	struct hci_conn_info_req req;
	struct hci_conn_info ci;
	struct hci_conn *conn;
	char __user *ptr = arg + sizeof(req);

	if (copy_from_user(&req, arg, sizeof(req)))
		return -EFAULT;

	hci_dev_lock(hdev);
	conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
	if (conn) {
		bacpy(&ci.bdaddr, &conn->dst);
		ci.handle = conn->handle;
		ci.type  = conn->type;
		ci.out   = conn->out;
		ci.state = conn->state;
		ci.link_mode = get_link_mode(conn);
	}
	hci_dev_unlock(hdev);

	if (!conn)
		return -ENOENT;

	return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
111
64.16%
2
28.57%
Linus Torvalds
48
27.75%
1
14.29%
Marcel Holtmann
5
2.89%
1
14.29%
Al Viro
4
2.31%
1
14.29%
Johan Hedberg
3
1.73%
1
14.29%
Gustavo Fernando Padovan
2
1.16%
1
14.29%
Total
173
100.00%
7
100.00%



int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
{
	struct hci_auth_info_req req;
	struct hci_conn *conn;

	if (copy_from_user(&req, arg, sizeof(req)))
		return -EFAULT;

	hci_dev_lock(hdev);
	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
	if (conn)
		req.type = conn->auth_type;
	hci_dev_unlock(hdev);

	if (!conn)
		return -ENOENT;

	return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
105
98.13%
1
50.00%
Gustavo Fernando Padovan
2
1.87%
1
50.00%
Total
107
100.00%
2
100.00%



struct hci_chan *hci_chan_create(struct hci_conn *conn)
{
	struct hci_dev *hdev = conn->hdev;
	struct hci_chan *chan;

	BT_DBG("%s hcon %p", hdev->name, conn);

	if (test_bit(HCI_CONN_DROP, &conn->flags)) {
		BT_DBG("Refusing to create new hci_chan");
		return NULL;
	}

	chan = kzalloc(sizeof(*chan), GFP_KERNEL);
	if (!chan)
		return NULL;

	chan->conn = hci_conn_get(conn);
	skb_queue_head_init(&chan->data_q);
	chan->state = BT_CONNECTED;

	list_add_rcu(&chan->list, &conn->chan_list);

	return chan;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luiz Augusto von Dentz
75
63.03%
1
11.11%
Johan Hedberg
29
24.37%
3
33.33%
Gustavo Fernando Padovan
7
5.88%
2
22.22%
Mat Martineau
6
5.04%
1
11.11%
Andrei Emeltchenko
1
0.84%
1
11.11%
Andre Guedes
1
0.84%
1
11.11%
Total
119
100.00%
9
100.00%



void hci_chan_del(struct hci_chan *chan)
{
	struct hci_conn *conn = chan->conn;
	struct hci_dev *hdev = conn->hdev;

	BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);

	list_del_rcu(&chan->list);

	synchronize_rcu();

	/* Prevent new hci_chan's to be created for this hci_conn */
	set_bit(HCI_CONN_DROP, &conn->flags);

	hci_conn_put(conn);

	skb_queue_purge(&chan->data_q);
	kfree(chan);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luiz Augusto von Dentz
57
70.37%
1
12.50%
Johan Hedberg
16
19.75%
3
37.50%
Gustavo Fernando Padovan
6
7.41%
2
25.00%
Andrei Emeltchenko
2
2.47%
2
25.00%
Total
81
100.00%
8
100.00%



void hci_chan_list_flush(struct hci_conn *conn)
{
	struct hci_chan *chan, *n;

	BT_DBG("hcon %p", conn);

	list_for_each_entry_safe(chan, n, &conn->chan_list, list)
		hci_chan_del(chan);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luiz Augusto von Dentz
31
77.50%
1
25.00%
Andrei Emeltchenko
7
17.50%
2
50.00%
Gustavo Fernando Padovan
2
5.00%
1
25.00%
Total
40
100.00%
4
100.00%



static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
						 __u16 handle)
{
	struct hci_chan *hchan;

	list_for_each_entry(hchan, &hcon->chan_list, list) {
		if (hchan->handle == handle)
			return hchan;
	}

	return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrei Emeltchenko
45
100.00%
1
100.00%
Total
45
100.00%
1
100.00%



struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
{
	struct hci_conn_hash *h = &hdev->conn_hash;
	struct hci_conn *hcon;
	struct hci_chan *hchan = NULL;

	rcu_read_lock();

	list_for_each_entry_rcu(hcon, &h->list, list) {
		hchan = __hci_chan_lookup_handle(hcon, handle);
		if (hchan)
			break;
	}

	rcu_read_unlock();

	return hchan;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrei Emeltchenko
70
100.00%
1
100.00%
Total
70
100.00%
1
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
1633
23.45%
72
32.73%
Marcel Holtmann
1271
18.25%
55
25.00%
Maksim Krasnyanskiy
932
13.38%
5
2.27%
Jakub Pawlowski
605
8.69%
6
2.73%
Andre Guedes
409
5.87%
15
6.82%
Linus Torvalds
403
5.79%
1
0.45%
Gustavo Fernando Padovan
264
3.79%
9
4.09%
Frédéric Dalleau
219
3.14%
3
1.36%
Andrei Emeltchenko
216
3.10%
13
5.91%
Waldemar Rymarkiewicz
211
3.03%
4
1.82%
Vinicius Costa Gomes
195
2.80%
8
3.64%
Luiz Augusto von Dentz
186
2.67%
3
1.36%
Claudio Takahasi
121
1.74%
2
0.91%
Ville Tervo
77
1.11%
3
1.36%
Bernhard Thaler
70
1.01%
1
0.45%
Lukasz Rymanowski
68
0.98%
3
1.36%
Jaikumar Ganesh
14
0.20%
1
0.45%
Andrzej Kaczmarek
13
0.19%
3
1.36%
Joe Perches
13
0.19%
1
0.45%
Nick Pelly
8
0.11%
1
0.45%
Al Viro
7
0.10%
1
0.45%
Hideaki Yoshifuji / 吉藤英明
6
0.09%
2
0.91%
Mat Martineau
6
0.09%
1
0.45%
Tomas Targownik
4
0.06%
1
0.45%
Fabian Frederick
4
0.06%
1
0.45%
Pavel Emelyanov
4
0.06%
1
0.45%
David Herrmann
2
0.03%
1
0.45%
Jaganath Kanakkassery
1
0.01%
1
0.45%
Ron Shaffer
1
0.01%
1
0.45%
Maxim Krasnyansky
1
0.01%
1
0.45%
Total
6964
100.00%
220
100.00%
Directory: net/bluetooth

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